According to ChainCatcher citing Tether’s official announcement, Tether AI Research has released QVAC BotPsy, an open-weight model with 800 million parameters based on Alibaba’s Qwen3.5 architecture. It is designed for tool use and agent tasks on personal devices.
Tether said BotPsy scored about twice as high as its base model on BFCL v4, ACEBench, τ-bench, and ToolSandbox, and outperformed the 2 billion-parameter Qwen3.5-2B-Think. The model can convert user requests into local tool calls, and developers can adapt and deploy its weights in their own systems.